You can't!
My windows live messenger doesn't work and the only soloution is to delete it and re-install it. I don't know what the problem is but it just doesn't work!!!!
To delete it then go in start menu, control pannel, add or remove programs, find the software andpress delete, say yes to all the questions and watch and wave goodbye to windows live messenger! BYE!!

livehunni x, July 2009